Category: Java programming question
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Get the Last Element of a List in Java
Assume a list: Approach 1: Using size() Output: Approach 2: Using Streams Output: Summary:
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Find Element with Maximum Frequency in a List Using Java Streams
Assume a list: Using Collectors.groupingBy + max() Output: Summary:
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Find Duplicate Elements in a List Using Java Streams
Assume a list: Using Collectors.groupingBy + filter Output: Summary:
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Group Employees by Department and Count Using Java Streams
Assume an Employee class: And a list of employees: Using Collectors.groupingBy + Collectors.counting
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Group Employees by Department Using Java Streams
Assume an Employee class: And a list of employees: Using Collectors.groupingBy
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Find the Oldest Person in a List Using Java Streams
Assume a Person class: And a list of persons: Using max() with Comparator
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Count Word Frequency in a Paragraph Using Java Streams
Assume a paragraph: Approach 1: Using split() + groupingBy Approach 2: Using Pattern + Matcher.results() (Unicode-aware, Java 9+)
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Create an Infinite Stream and Limit Output in Java
Example 1: Using Stream.iterate() Example 2: Using Stream.generate()
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Reverse a List in Java
Assume a List<T> list: Approach 1: Using Streams (Index-based mapping) Approach 2: Using Collections.reverse() (Recommended for mutable lists)
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Count Words in a String Using Java Streams
Assume a String text: Approach 1: split() + groupingBy Approach 2: Pattern + Matcher.results() (Unicode-aware, Java 9+)